Headwear accessory



FIG. 1 is a front perspective view of a headwear accessory showing an embodiment of the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dot-dash-dot broken lines in FIGS. 1, 4, 5 and 7 of the headwear accessory denote unclaimed boundaries of the claimed design, and the dash-dash broken lines in the Figures show portions of the headwear accessory which form no part of the claimed design. 

CLAIM The ornamental design for a headwear accessory, as shown and described. 